Metal-Coated Cenospheres Obtained via Magnetron Sputter Coating: A New Precursor for Syntactic Foams

被引:20
作者
Shishkin, A. [1 ]
Hussainova, I. [2 ]
Kozlov, V. [3 ]
Lisnanskis, M. [4 ]
Leroy, P. [5 ]
Lehmhus, D. [6 ]
机构
[1] Riga Tech Univ, Inst Mat & Struct, Dept Bldg Mat & Prod, Kipsalas Str 6, Riga, Latvia
[2] Tallinn Univ Technol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia
[3] Sidrabe Inc, 17 Krustpils Str, LV-1073 Riga, Latvia
[4] SMW Engn, Kr Barona 3, LV-1050 Riga, Latvia
[5] Ionics SA, ZI Hauts Sarts, Rue Alouettes 1,Zone 3, B-4042 Liers, Belgium
[6] Fraunhofer Inst Mfg Technol & Adv Mat IFAM, D-28359 Bremen, Germany
关键词
FREQUENCY ELECTROMAGNETIC-FIELDS; PARTICLES; EXPOSURE; BEHAVIOR;
D O I
10.1007/s11837-018-2886-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Syntactic foams (SFs) and metal matrix syntactic foams (MMSFs) represent an advanced type of metal matrix composites (MMCs) based on hollow microspheres as particulate reinforcement. In general, SF and MMSFs allow tailoring of properties through choice of matrix, reinforcement, and volume fraction of the latter. A further handle for property adjustment is surface modification of the reinforcing particles. The present study introduces cenospheres for use as filler material in SF and MMSFs and as lightweight filler with electromagnetic interference shielding properties in civil engineering, which have been surface coated by means of physical vapor deposition, namely vibration-assisted sputter coating using a magnetron sputtering system. Altogether four types of such cenosphere-based composite powders (CPs) with an original particle size range of 50-125 A mu m (average particle size d(50) 75 A mu m) were studied. Surface films deposited on these were composed of Cu, stainless steel, Ti, and Ti-TiN double layers. For Cu coatings, the deposited metal film thickness was shown to be dependent on the sputtering energy. Scanning electron microscope backscattering images revealed nonporous films uniform in thickness directly after sputtering. Film thickness varied between 0.15 A mu m and 2.5 A mu m, depending on coating material and sputtering parameters. From these materials, samples were produced without addition of metal powders, exhibiting metal contents as low as 8-10 wt.% based on the coating alone. Obtained samples had an apparent density of 1.1-1.9 g/cm(3) and compressive strengths ranging from 22 MPa to 135 MPa.
引用
收藏
页码:1319 / 1325
页数:7
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